文档解释
ORA-01380: Instance string (thread string) has less than two string block size log files
Cause: One of the following occurred: (1) An attempt was made to switch to specified block size logs for all threads. (2) An attemp was made to open a thread.
Action: Add log files to the thread that signals error, and try again.
来回答
ORA-01380：该错误指示实例（线程）中至少需要两个具有相同块尺寸大小的日志文件才能正常工作。
官方解释
常见案例
常见的情况是，数据库中存在两个日志文件，但其中一个日志文件的块大小与另一个不一致。
正常处理方法及步骤
1）关闭数据库：shutdown immediate
2）更改另一个文件的块尺寸大小：alter database XXXX resetlogs;
3）重新创建数据库：startup open;
4）检查日志文件：select blocksize from v$logfile;
5）如果需要，可以更改block size：alter database LOGFILE XXXX blocksize xxxx;
